CN101749302A - On-line virtual testing analysis system of electrohydraulic servo system - Google Patents
On-line virtual testing analysis system of electrohydraulic servo system Download PDFInfo
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- CN101749302A CN101749302A CN200810204246A CN200810204246A CN101749302A CN 101749302 A CN101749302 A CN 101749302A CN 200810204246 A CN200810204246 A CN 200810204246A CN 200810204246 A CN200810204246 A CN 200810204246A CN 101749302 A CN101749302 A CN 101749302A
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Abstract
The invention relates to performance testing equipment of hydraulic equipment, in particular to an on-line virtual testing analysis system of the hydraulic equipment. The on-line virtual testing analysis system of an electrohydraulic servo system is established by a computer platform and comprises an acquisition module, a management module, a report module and an analysis module, wherein the acquisition module uses a PXIe acquisition platform, an SCXI signal conditioning platform and a CDAQ portable data acquisition platform to acquire data; the management module comprises a data management subsystem; the report module displays the result in a form of word report aiming at the test result of an object; and the analysis module comprises an analysis subsystem for performing characteristic value acquisition on a waveform result acquired by a data testing part and extracting the required result. The on-line virtual testing analysis system of the electrohydraulic servo system has the functions of modeling analysis, testing method prompt, data acquisition and real-time signal analysis and the like, and improves the detection efficiency.
Description
Technical field
The present invention relates to the hydraulic equipment performance test apparatus, relate in particular to a kind of hydraulic equipment on-line virtual testing analysis system.
Background technique
Along with the development of industrial automation, hydraulic equipment is obtaining more and more widely application with the advantage of its uniqueness.The hydraulic equipment fault has characteristics such as disguise, diversity, uncertainty and causality complexity, easy-to-search reason not after fault occurs.In a single day hydraulic system breaks down, and not only causes equipment impaired, and quality of product descends, production line downtime, and may jeopardize personal safety, cause environmental pollution, bring enormous economic loss.Therefore how guaranteeing the normal operation of hydraulic system, how in time to find fault, even find the sign of fault in advance, all is problem demanding prompt solution.
At present, the fault diagnosis of hydraulic system mainly is that engineers and technicians are by looking, listen, touch, smell, mode such as ask and be aided with simple consultation of doctors instrument and carry out simple diagnosis with the practical experience of oneself, or on the basis of simple diagnosis to doubt anomaly, use certain accurate detector device (as ferrograph analyzer, oil quality detector etc.) it is carried out the accurate diagnosis analysis, thereby find out reason and position that hydraulic system breaks down, electrohydraulic servo system is the control technique of dynamic adjustment process, effectively detect and diagnostic means owing to lack, the general oscillography table that adopts, signal generator, the XY recorder, the instrument and apparatus that spectrum analyzer etc. are general, signal processing can only be accomplished ex-post analysis, the especially difficult assurance of dynamic performance of electrohydraulic servo system running state, failure mechanism analysis and maintenance strategy are formulated the foundation of shortage science.
Summary of the invention
The present invention is intended to solve the above-mentioned defective of prior art, and a kind of on-line virtual testing analysis system of electrohydraulic servo system is provided.The present invention has functions such as modeling analysis, test method prompting, data capture and real-time signal analysis, improves detection efficiency.
The present invention is achieved in that a kind of on-line virtual testing analysis system of electrohydraulic servo system, and it utilizes computer platform to set up, and it comprises:
Acquisition module, it utilizes PXIe acquisition platform, SCXI Platform for Signal Condition and CDAQ portable data acquisition platform image data;
Administration module, it comprises a data ADMINISTRATION SUBSYSTEM;
Reporting modules, it will show in word form mode at the test result that object is done;
Analysis module, it comprise one with data test partly adopt the waveform result carry out the eigenvalue collection, the analyzing subsystem that the result of needs is extracted.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described acquisition module comprise the configuration subsystem module, gather online treatment storage system and database interface in real time.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described configuration subsystem module comprise that configuration interface and configurable number adopt interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described real-time collection online treatment storage system comprises:
The acquisition mode that makes up between platform is selected;
Data storage cell and,
The data load-on module.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, the acquisition mode that makes up between described platform comprises: PXI or cDAQ gather, SCXI gathers, the PXI/cDAQ+SCXI combination is gathered, the PXI+cDAQ combination is gathered and the PXI+cDAQ+SCXI combination is gathered.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described analysis module comprises: user interface, parser and internal interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described user interface comprise analysis tool operation-interface and data option interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described analysis tool operation-interface comprises filtering analysis, fft analysis and wavelet analysis.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described parser comprises: static analysis, transient analysis and frequecny domain analysis.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described internal interface comprises record interface, data file interface and database interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described administration module comprise tree-like operational administrative, interface operation management, database manipulation management, configuration-system, tool management, help system and object method record management.
The present invention designs in order to detect the electrohydraulic servo system performance, and it is primarily aimed at the equipment state detection and the fault diagnosis technology of electrohydraulic servo system and develops development.The major function of this invention comprises measurand processing, data capture and compositions such as signal generation, data processing section and report generation.The data test part designs based on PXI, SCXI and CDAQ framework, comprises signals collecting, signal switching, signal generation etc.The measurand treated section comprises the test of carrying out optional method according to tested object, and can be according to the corresponding PXI of the different configurations of tested object number of channels, CDAQ passage.Data processing section with data test partly adopt the waveform result carry out the eigenvalue collection, will need to such an extent that the result extracts.The report generation part will be done to such an extent that test result shows in word form mode at this object.Operation system adopts Windows XP general-purpose platform, and driver of modules and special test software constitute a whole set of electrohydraulic servo system testing property equipment.
Electrohydraulic servo system ability meter of the present invention can be realized real-time collection, analysis and record function, can improve analysis efficiency greatly, and equipment special belongs to portable instrument, has increased mobility and equipment utilization efficiency.Particularly, the present invention sets up control electrohydraulic servo system state effectively to detect and diagnostic means, realizes the assurance of electrohydraulic servo system running state, the foundation that provides failure mechanism analysis and maintenance strategy to formulate; And, make the electrohydraulic servo system performance optimization: electrohydraulic servo system job requirement " steady, accurate, fast ", and this three aspect requires to condition each other, and as improving speed of response, may influence the stability of system and carry out precision.Utilize the electrohydraulic servo system ability meter, provide systematic parameter to adjust foundation for newly-built equipment debugging or in the performance optimization of labour operation hydraulic equipment, the lifting means performance guarantees quality of product.
The present invention can preserve test data and analyze data under different paths towards the design of measurand according to tested object, conveniently calls at any time, and data maintenance is more convenient, quick; Test method of the present invention is simple and easy to usefulness, can call historical testing scheme, and the characteristic quantity of measurand performance is directly provided by data processing module, avoids calculation processes complicated and that specialty is had relatively high expectations; The multi-platform test function of the present invention satisfies all kinds of hydraulic system systematic function stable states and dynamic test needs.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is man-machine surface chart;
Fig. 2 is for analyzing schematic representation;
Fig. 3 is the entire system structural drawing;
Fig. 4 is signal acquisition module structure function figure;
Fig. 5 is data processing and analytical structure functional diagram;
Fig. 6 is data management module structure function figure;
Fig. 7 is the tested object circuit diagram;
Fig. 8 is tested object dynamic analysis figure as a result;
Fig. 9 detects time domain waveform figure for EPC;
Figure 10 detects spectrogram for EPC.
Embodiment
Extremely shown in Figure 6 as Fig. 1, a kind of on-line virtual testing analysis system of electrohydraulic servo system, it utilizes computer platform to set up, and it comprises:
Acquisition module, it utilizes PXIe acquisition platform, SCXI Platform for Signal Condition and CDAQ portable data acquisition platform image data; The characteristics of each platform are:
PXIe data acquisition platform: adopt up-to-date PXIe technology, the PXIe technology has further improved the transfer rate of bus on the basis of original PXI technology, reached every slot and made the system high efficiency operation up to the dedicated bandwidth of 1GB/s and the system bandwidth that surpasses 3GB/s.
SCXI Platform for Signal Condition: SCXI is a kind of high-performance, and multichannel signal condition and matrix switch platform are with M series, S series and modular instrument hardware compatibility.One cover SCXI system is made up of one or more firm cabinets, in adorn a plurality of signal condition modules, can do signal processing to sensor signal or high voltage signal.In this system, mainly play input/output signal is provided by the function of decay to provide the stable voltage supply data collecting card that is fit to gather.Possess the usb data acquisition module simultaneously, under the less demanding situation of net synchronization capability, can also directly use as data acquistion system.
CDAQ portable data acquisition platform: high-performance and the flexibility with modularization combines together NI CompactDAQ with the low price characteristics with the easy-to-use of data logger, be to possess the configurable portable testing set that sensor is supported, can carry out the measurement task whenever and wherever possible under the environment at the scene easily.
Administration module, it comprises a data ADMINISTRATION SUBSYSTEM;
Reporting modules, it will show in word form mode at the test result that object is done;
Analysis module, it comprise one with data test partly adopt the waveform result carry out the eigenvalue collection, the analyzing subsystem that the result of needs is extracted.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described acquisition module comprise the configuration subsystem module, gather online treatment storage system and database interface in real time.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described configuration subsystem module comprise that configuration interface and configurable number adopt interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described real-time collection online treatment storage system comprises:
The acquisition mode that makes up between platform is selected;
Data storage cell and,
The data load-on module.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, the acquisition mode that makes up between described platform comprises: PXI or cDAQ gather, SCXI gathers, the PXI/cDAQ+SCXI combination is gathered, the PXI+cDAQ combination is gathered and the PXI+cDAQ+SCXI combination is gathered.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described analysis module comprises: user interface, parser and internal interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described user interface comprise analysis tool operation-interface and data option interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described analysis tool operation-interface comprises filtering analysis, fft analysis and wavelet analysis.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described parser comprises: static analysis, transient analysis and frequecny domain analysis.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described internal interface comprises record interface, data file interface and database interface.
Described a kind of on-line virtual testing analysis system of electrohydraulic servo system, described administration module comprise tree-like operational administrative, interface operation management, database manipulation management, configuration-system, tool management, help system and object method record management.
In this signal acquiring processing system, adopt the virtual instrument technique exploitation.So-called virtual instrument is meant with the computer technology to be the user-defined measurement measurement and control instrument of core.Virtual that just is meant the function of removing to simulate and expand traditional instrument by the software and hardware technology of computer, realize that software is exactly instrument, customize the function of oneself flexibly according to test request by user oneself, and the restriction that not defined by apparatus manufacture, the user has obtained special-purpose advantages of simplicity and high efficiency instrument with regard to having obtained at the system of oneself like this.Collection, storage, computing, analysis, the output of finishing signal reach the control to peripheral hardware.
Software function
Signal input and output control
Acquisition system is gathered the primary signal of input and output in the system under test (SUT).Owing to include 3 kinds of different test platforms in this system, finish the separate configurations of each channel signal.Acquisition system realizes following function:
Optional passage collection
The optional sampling rate
Optional collection signal type
Optional collection signal amplitude scope
Testing process method and data processing
In this test system, test these several aspects and comprehensively the performance of electrohydraulic servo system is estimated with static test, transient response test, frequency domain response.Like this, follow the flow process of each different content measurements, the system software controls testing process directly extracts needed data feature values to finishing with the data that collect thus, is used for generating report.Its corresponding content comprises:
Input value and output value in the static test extraction system steady state
The transient response Test extraction is the dynamic process of system's transition after an excitation, leading indicator has rise time tr, peak time tp, maximum overshoot Mp, adjusts time ts, retard time td, the number of oscillation.
Frequency domain character Test extraction system is corresponding to the characteristic of system under the input different frequency.Data result is illustrated with bode figure and nyquist plotted curve display list, and its eigenvalue has cutoff frequency ω cut, frequency range BW, resonance frequency omega r, resonance peak Mr, phase margin γ and magnitude margin Kg.
Analysis instruments such as wavelet analysis, fast Flourier fft analysis, digital filtering.
System layout
Be used for problem that whole system is configured, its content mainly comprises:
Take the configuration of different test method and flow process at the difference of object, generate with the diacritical configuration file of product type, and can call it.Comprise information such as TCH test channel, test volume, output signal in the configuration file.
System hardware is from detecting, and whether checking system hardware proper functioning.
Data processing
At this electro-hydraulic servo test system, its data processing function comprises:
Initial data storage in the test process.
Characteristic value data is handled in the analytic process
The Word report generation was handled after test analysis finished.
Unified the depositing in the file, in the above-mentioned back of finishing dealing with so that stay shelves.
The light playback of historical data.
The present invention supports the storage of several data file, and several data file types such as binary system bin file, tdm file, tdms stream file, text, electronic form file are arranged.In this system,, use the tdm file mode so draft because the speed and the file size of data storage also had higher requirement.Test data format exchange file (TDM) is a kind of mixed file form, and it combines the ascii data of binary data and XML form.In the TDM file, the raw value data are stored with binary format.So just utilized the strong point of binary format, such as storing efficiently, visiting fast.The structure of initial data and relevant information are then stored with the XML form, the information in convenient visit and the locating file.The processing of eigenvalue need realize by the self-defined algorithm of programming in LabVIEW.Call in modular mode.
Can supply for example further processing and the analysis of Matlab of third party software.
Database manipulation
In test method, can call former configuration.Its database mainly contains:
The measurand database, it comprises the characteristics of objects value, type adopts which kind of test mode etc.
The test mode database, it comprises the input output way, testing procedure flow process or the like.
The test data database, it comprises the initial data of test, the eigenvalue of extraction, chart of performance or the like.
Embodiment
(1) control circuit detects
With a second-order low-pass filter circuit is that example detects every index, circuit diagram such as Fig. 7.
Form a second order passive filter circuit by R1, R2, C1, C2, a voltage follower circuit is kept its output stability thus again, carries out the simulation of input and output with virtual instrument.
XPG1 represents a signal generator, by inserting a follower circuit, the output access of virtual oscillograph of follower circuit and Bode ANALYZER behind the second order filter.Analysis result such as Fig. 8.
(2) EPC correcting device electrohydraulic servo system state-detection
The coiling machine of certain cold-rolled steel factory's degreasing unit has adopted the EPC control apparatus of German EMG company, the strip edge portion fault of can not aliging appears in coiling machine continuously in one period, according to the physical device needs, adopt the electrohydraulic servo system ability meter that this EPC electrohydraulic servo-controlling system is detected.Test result such as Fig. 9,10, display system is disturbed by external high frequency.
Electrohydraulic servo system ability meter of the present invention can be realized real-time collection, analysis and record function, can improve analysis efficiency greatly, and equipment special belongs to portable instrument, has increased mobility and equipment utilization efficiency.Owing to the invention belongs to the general testing property equipment of hydraulic equipment, be applicable to the hydraulic equipment state-detection and the fault diagnosis field of every profession and trade, have bigger application value.
Claims (11)
1. on-line virtual testing analysis system of electrohydraulic servo system, it utilizes computer platform to set up, and it is characterized in that it comprises:
Acquisition module, it utilizes PXIe acquisition platform, SCXI Platform for Signal Condition and CDAQ portable data acquisition platform image data;
Administration module, it comprises a data ADMINISTRATION SUBSYSTEM;
Reporting modules, it will show in word form mode at the test result that object is done;
Analysis module, it comprise one with data test partly adopt the waveform result carry out the eigenvalue collection, the analyzing subsystem that the result of needs is extracted.
2. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 1 is characterized in that, described acquisition module comprises the configuration subsystem module, gathers online treatment storage system and database interface in real time.
3. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 2 is characterized in that, described configuration subsystem module comprises that configuration interface and configurable number adopt interface.
4. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 2 is characterized in that, described real-time collection online treatment storage system comprises:
The acquisition mode that makes up between platform is selected;
Data storage cell and,
The data load-on module.
5. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 3, it is characterized in that the acquisition mode that makes up between described platform comprises: PXI or cDAQ gather, SCXI gathers, the PXI/cDAQ+SCXI combination is gathered, the PXI+cDAQ combination is gathered and the PXI+cDAQ+SCXI combination is gathered.
6. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 1 is characterized in that, described analysis module comprises: user interface, parser and internal interface.
7. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 6 is characterized in that, described user interface comprises analysis tool operation-interface and data option interface.
8. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 7 is characterized in that, described analysis tool operation-interface comprises filtering analysis, fft analysis and wavelet analysis.
9. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 6 is characterized in that, described parser comprises: static analysis, transient analysis and frequecny domain analysis.
10. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 6 is characterized in that described internal interface comprises record interface, data file interface and database interface.
11. a kind of on-line virtual testing analysis system of electrohydraulic servo system according to claim 1, it is characterized in that described administration module comprises tree-like operational administrative, interface operation management, database manipulation management, configuration-system, tool management, help system and object method record management.
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| CN103062155A (en) * | 2012-12-19 | 2013-04-24 | 天津工程机械研究院 | Modularization hydraulic comprehensive testing system and testing method thereof |
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Application publication date: 20100623 |